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Different models (in particular, of different sizes) batteries, more capacity, he provided the use of the longest. Stripped the size and weight of factors, of course, the more capacity the better.
But the same battery type, nominal capacity (eg, 600mAh) are the same, the actual measurement of the initial capacity different: for example a 660mAh, 605mAh the other is less than 605mAh to 660mAh’s okay. Reality may be right for a high capacity electrode materials to increase the initial capacity of more things, and less stable with things electrode, the result is that dozens of times recycled after the battery capacity high capacity rapid failure, while the ability of a low battery is still strong. Many domestic manufacturers of batteries tend to use this method to obtain high-capacity battery. while users six months after the mess of standby time is too bad. These civilians AA Ni-MH battery (which is on the 5th battery), 1400mAh generally, but it is also standard ultra-high-capacity (1600mAh), the truth is the same. ★ improve capacity at the expense of sacrificing the life cycle, the battery materials factory does not change the top and bottom of the article it is impossible to truly “improve” the capacity of the battery. |
Sep 17 2009
More capacity battery better?
Sep 17 2009
Which batteries are green batteries?
Nickel-metal hydride battery (Ni-MH) and nickel-cadmium batteries (Ni-Cd) have the same operating voltage (1.2V), but because of the alloy or rare earth alloy such as TiNi material of negative electrode active material of hydrogen storage, to replace carcinogenic substances cadmium, not only to make this new battery in a green battery, but also the battery specific energy increased by nearly 40 % to 60-80Wh/kg and 210-240Wh / L. This battery is in the early 90s and gradually realize industrialization and, above all for use in batteries for mobile phones. At present, although its dominance on the phone being progressively replaced by lithium-ion batteries, but in Europe and the United States mobile phone applications, its market share is still about 50% .
Li-ion battery (Li-ion) by the lithium ion can embed and de-embedded carbon as the anode and reversible lithium intercalation in metal oxides as cathode (LiCoO2, LiNiO2 or LiMn2O4) and composition of organic electrolytes his blood work is 3.6V Therefore, a lithium-ion battery is equivalent to three nickel-cadmium batteries or nickel metal hydride. The energy density of this battery can be more than 100Wh/kg and 280Wh / L, again much higher than the battery nickel metal hydride specific energy. Given the above advantages, in recent years, 1993-2000, production and use of a very high rate.
Alkaline batteries (alkaline) compared to the size of normal batteries have higher capacity and with high capacity discharge current. In recent years, has been applied to mercury, zinc powder free, allowing the cell to become a green battery, and become the mainstream product in the original battery is still alkaline BP machine use more power. At the same time, the world is also concerned about the rechargeable battery of the U.S. company has introduced a rechargeable alkaline manganese, slow growth in product applications. This battery to maintain the discharge characteristics of the original battery, and user fees of tens to hundreds of times (in charge of depth and discharge cycle life of about 25 times).
Plastic Lithium battery (LIP) is a lithium metal as anode, the conductive polymer electrolyte to make a new battery, its energy density reached 170Wh/kg and 350Wh / L. Malpractice plastic lithium-ion batteries, lithium-ion battery is currently in the organic electrolyte stored in a polymer film, or the use of conducting polymers as electrolyte, so that no free electrolyte in the battery. This battery can reach the plastic packaging aluminum hot-film composite with a light weight, the shape can be changed arbitrarily, security and enhanced functionality.
Fuel cell (FC) is a use of fuels (like hydrogen-containing fuel) and oxidizer (such as oxygen or air oxygen) is a direct and continuous arrangement of electricity, because avoid the limits of the Carnot cycle, the production of electricity is not only efficient (conversion efficiency of the electrochemical reaction may be as high as 40% or more), and non-polluting gas emissions, and therefore the ‘Future generation methods, efficient and clean power. Many domestic and foreign firms are committed to developing appropriate mobile phone, the PEM fuel cell laptop, once put into service, its great value for money.
Sealed Lead-acid battery is a lead-acid batteries.
The technology of new green battery and related industries is growing rapidly.
1. Equipment storage of hydrogen and nickel-hydride batteries, metal - rechargeable nickel metal hydride (Ni-MH rechargeable)
2. Lithium-ion embedded materials in liquid electrolyte lithium-ion batteries
3. Lithium polymer electrolyte or lithium-ion batteries
4. Zinc-air batteries and PEM fuel cells
In addition to these things, the rapid growth of the telecommunications industry in China, the battery industry in China is very high speed in order to promote mercury environmentally-free alkaline zinc-manganese the original pool and rechargeable batteries and sealed lead-acid battery technology development and developing applications.
The points mentioned above is for reference only!
Sep 15 2009
The future of clean energy lithium battery
Lithium southern China by listening to the Fourth High Level Forum on Chinese and foreign experts to give lectures on the foregoing has a deep understanding of the impression.
The U.S. government has taken to support the development of the Battery Industry
U. S. Lithium Acting Chairman, U.S. President Riff Broad Dr. Buluodepu speech at the forum referred to S new program to the recent U. S. government “economic stimulus. According to his own observations, he felt came to the United States since 1981, after 20 years, the U.S. government is an unprecedented effort to increase financial support for the industry. In the United States and the financial assistance program of the government, there are two billion dollars for the battery industry, with about 1.2 billion U.S. dollars, mainly used in batteries and batteries for development.
Dr. Riff Broad said that in this industry as a whole unique among financing transactions, the battery industry, the emphasis has been placed among the “top priority”.
Lithium-ion batteries have obvious advantages
Lithium-ion battery as a lithium metal version improved, with clear benefits. It has a high working voltage, small size, light weight, high energy, no memory effect, no pollution, low self-discharge, long cycle life characteristics are optimized for battery electric vehicles as one. Present in the high technology of this region “stack structure of the battery” will soon be made of several thin layers of cells, and overlapping, so that access can be very small volume of high efficiency. Currently in this area to Nissan Motor Co. to move to the forefront in the application.
To improve facility utilization, the current number of electric cars, lithium can be charged using regular household voltage, but the disadvantage is the need to charge up to several hours. To promote large-scale Li-ion battery car, you need to develop a rapid charging stations matching. In March this year, Japanese researchers have developed a new type of “Lithium - air” battery, this battery without charge, simply replace the water in the cathode-electrolyte function through the area of the map etc. to replace the lithium metal anode can be used continuously. In other words, charging facilities to add an item as a “filling station” rather than a large bolt with a “battery charging station.”
Development of renewable energy lithium-ion battery is taking on difficult tasks
“Fourth High-Level Forum held in South China Lithium-Ion battery suitable for the time!” This is the forum was attended by CAS academician YANG Yu-sheng said Reporters sent in the past. Academician Yang considered the appropriateness of the time not only because of our electricity production of lithium in the world, just behind Japan, China is already the power of lithium, but also coincides with our national attention on the development of renewable energies, the lithium battery that can play in this great role.
Academician Yang told reporters said that lithium could save a lot of fuel used in cars. It can be wind, solar and other clean energy store, and when needed for use.
He said that over the past 15 years, lithium-ion batteries in promoting the technology industry throughout the world have made a great contribution. In the hybrid external plug in hybrid electric vehicles, electric vehicles to fuel cell vehicles and pure electric cars electric four different principles which he has rented a pure electric vehicle, I think we should give priority to development and it has no oil, adapted to China some state oil company of the nation, in addition, its structure is relatively simple, non-asphalt, earth and water and maintenance, are very convenient, while saving material and energy.
According to Academician Yang introduction, the current lithium are small to large, from a unipolar to the series and parallel, low power switch high power directional, while the forum on the lithium battery, new materials, new technologies, new applications for the many discussions, of course, it is very timely.
Sep 01 2009
DHS Clarifies Laptop Border Crossing Rules: What You Need to Know
Earlier this week, the U.S. Department of Homeland Security made it clear that border crossing officials could continue to search any device that can store electronic media without any suspicion of wrongdoing.
Although the revised policy ensures searches will be completed in a “timely manner” (up to 30 days) and that travelers will stay informed about the search’s progress, travelers crossing the border might want to consider a few things.
Officials can still seize any device (including MP3 players or flash drives) and look at any file on it (including Internet browsing history) without giving any reason.
The Association of Corporate Travel Executives (ACTE) believes agents take laptops, make an image of the hard drive and then return the laptop to its owner in the mail. Any copied files could be stored “indefinitely.” (Imagine what the Border Patrol’s iTunes Library will look like after “indefinitely” storing DRM-free music from several dozen searches.) The ACLU is also taking a dim view of the DHS policy, and is challenging it in court.
For the moment, though, it’s smart to be prepared. Although the DHS’s exact procedures are unspecified, the department’s new policy states when travelers are subject to a search, agents will provide them “with clear and concise material informing them of the reasons for the search, how their data may be used and detailed information about their constitutional and statutory rights.”
If you’re traveling for business and have important files you’ll need on your trip, it wouldn’t hurt to save them to multiple locations so you aren’t left without them. Better yet, use Google Docs or another Internet-based storage system to ensure your private information stays private.
In the case of a search, ACTE recommends you inform the agent that you have sensitive information on your computer. Try to get your concern noted in writing; at least, be sure to express it verbally. ACTE says this will help you retain more legal rights for registering your concern.
Although these searches don’t occur very often (the Border Patrol looked at around 1000 laptops and searched 46 laptops in-depth in the past ten months) the best bet for travelers concerned about privacy is to leave unneeded electronic storage behind.
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